1. (adj)nine, 9, IX, niner, Nina from Carolina, ennead the cardinal number that is the sum of eight and one Synonyms: ennead, nine-spot, ball club, baseball club, club, niner, nine Antonyms: ordinal
2. (adj)nine, 9, ix denoting a quantity consisting of one more than eight and one less than ten Synonyms: nine, ix Antonyms: ordinal